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Dissertations / Theses on the topic 'Multimedia networking'
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Tosun, Ali Saman. "Security mechanisms for multimedia networking." Columbus, OH : Ohio State University, 2003. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1054700514.
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Thesis (Ph. D.)--Ohio State University, 2003.Title from first page of PDF file. Document formatted into pages; contains xvi, 135 p.: ill. Includes abstract and vita. Co-advisors: Wu-Chi Feng, Dong Xuan, Dept. of Computer ad information Science. Includes bibliographical references (p. 129-135).
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Guenkova-Luy, Teodora. "Multimedia networking coordination of multimedia services in next generation mobile networks." Saarbrücken VDM, Müller, 2007. http://deposit.d-nb.de/cgi-bin/dokserv?id=3037222&prov=M&dok_var=1&dok_ext=htm.
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Denney, Justin. "Multimedia Delivery Services for Highly Heterogeneous Networking Environments." Thesis, Lancaster University, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.514416.
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Lunn, Andrew Stuart. "A mini cell architecture for multimedia systems." Thesis, Lancaster University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.337352.
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Tovslid, Magnus Jeffs. "JPEG 2000 Quality Scalability in an IP Networking Scenario." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for elektronikk og telekommunikasjon, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-18465.
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In this thesis, the JPEG 2000 quality scalability feature was investigated in thecontext of transporting video over IP networks. The goals of the investigation wastwo-fold. First, it was desired to nd a way of choosing the number of quality layersto embed in a JPEG 2000 codestream. In previous work, this choice has been moreor less arbitrary. Second, it was desired to nd how low the video bitrate could bedropped before it became perceptible to a viewer. This information can be usedin an IP networking scenario to e.g. adapt the video bitrate blindly according tothe measured channel capacity as long as the drop in bitrate is expected to beimperceptible. When the drop in bitrate is expected to be perceptible, a switchcould be made to a smoother bitrate adaptation.A way of choosing the total number of quality layers to embed in a codestreamwas found by minimizing the dierence in predicted quality between direct andscaled compression. Scaled compression is the compression which is achieved byextracting quality layers. The minimization procedure was bound by the speed ofthe encoder, as it takes longer for an encoder to embed more quality layers. It wasfound that the procedure was highly dependent on the desired bitrate range.A subjective test was run in order to measure how large a drop in video bitrate hadto be for it to become perceptible. A newly developed JPEG 2000 quality layerscaler was used to produce the dierent bitrates in the test. The number of qualitylayers to embed in codestream was found by using the minimization procedurementioned above. It was found that, for the bitrate range used in the test, 2 - 30Mbits/s for a resolution of 1280x720 at 25 frames per second, the magnitude ofthe drop in bitrate had to be at least 10 Mbits/s before the participants in the testnoticed it. A comparison with objective quality metrics, SSIM and PSNR, revealedthat it was very dicult to predict the visibility of the drops in bitrate by usingthese metrics. Designing the type of rate control mentioned in the rst paragraphwill therefore have to wait until a parameter with good predictive properties canbe found.
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Merle, Carol Van Diemel. "Innovative networking : the synergy between the public relations industry and multimedia newspaper." Thesis, Cape Peninsula University of Technology, 2011. http://hdl.handle.net/20.500.11838/2307.
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Thesis (MTech (Public Relations Management))--Cape Peninsula University of Technology, 2011.The purpose of this mini thesis is to investigate the research question, "What is the importance and effectiveness of public relations practice in obtaining coverage in a multimedia newspaper?" It is obvious that the introduction of the multimedia newspaper has affected the role of the public relations practitioner and the role of the journalists. But has it changed the manner in which public relations practitioners practice public relations (that is the influence of the multimedia newspaper on the public relations industry) and its value in the eyes of the multimedia journalist. The study will measure the multimedia editorial staff's opinion and perceptions of the multimedia newspapers content and public relations practice's impact on that content. The research is interested in whether the introduction of the multimedia newspaper has affected the role of the public relations practitioner and the journalists and whether it has changed the manner in which public relations practitioners practice public relations (that is the influence of the multimedia newspaper on the public relations industry). The research reviews the perceived value of public relations to journalists operating within the multimedia newspaper context.
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Samain, Jacques. "Improving quality of experience in multimedia streaming by leveraging Information-Centric Networking." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLT012/document.
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Les réseaux centrés sur l’information (ICN) sont une architecture prometteuse pour faire face à l’explosion du trafic multimédia sur internet et à la mobilité croissante des utilisateurs: non seulement ICN peut améliorer la qualité d’expérience de l’utilisateur, mais ICN peut également étendre naturelle et de façon transparente la prise en charge du trafic vidéo dans les fonctions réseau. Cependant, à notre connaissance, une évaluation approfondie des avantages apportés par ICN à la diffusion multimédia n’a pas encore été réalisée. Dans cette thèse, nous voulons réduire l’écart qui nous sépare d’une telle évaluation en prenant en compte ICN dans divers scénarios de diffusion multimédia.Tout d’abord, nous évaluons les avantages apportés par du DAS (Dynamic Adaptive Streaming) basé sur ICN par rapport au streaming basé sur TCP/IP, au moyen d’une campagne expérimentale comprenant plusieurs canaux (des émulations Wi-Fi et LTE, des traçes 3G/4G), plusieurs clients (mélange homogène et hétérogène, arrivées synchrones et asynchrones) et des logiques d’adaptation DAS soigneusement sélectionnées pour couvrir les deux grandes familles d’algorithmes disponibles. Nous mettons aussi enexergue les pièges potentiels qui sont néanmoins facilement évitables.Ensuite, nous montrons comment l’assistance du réseau contribue à améliorer la qualité d’expérience des utilisateurs. Pour ce faire, nous tirons parti de la fonctionnalité de mise en cache réseau d’ICN et proposons un signal re ́seau simple envoyé périodiquement par le cache à exploiter par l’algorithme d’adaptation DAS pour optimiser la qualité d’expérience de l’utilisateur en évitant le phénomène bien connu des oscillations induites par le cache. Des expériences nous permettent de valider le bien-fondé de notre approche.Enfin, puisque la diffusion multimedia en direct gagne du terrain, nous proposons hICN-RTC, en intégrant hICN (hybrid ICN), une solution ICN-dans-IP, à WebRTC, accompagné du protocole RICTP (Realtime Information Centric Transport Protocol), un protocole de transport basé sur le contenu, qui minimise la latence. Bien que toujours en développement, les résultats des premières expériences sont prometteurs car ils montrent que le trafic induit par hICN-RTC ne croit qu’avec le nombre de locuteurs actifs plutôt qu’avec le nombre total de participantsInformation-Centric Networking (ICN) is a promising architecture to address today Internet multimedia traffic explosion and increasing user mobility: not only to enhance the user’s quality of experience, but also to naturally and seamlessly extend video sup- port deeper in the network functions. However, to the best of our knowledge, a thorough assessment of the benefits brought by ICN to multimedia delivery has not been done yet. In this thesis, we aim at reducing the gap to such assessment, by considering ICN in various multimedia delivery scenarios.First, we assess the benefits brought by an ICN-based Dynamic Adaptive Streaming (DAS) compared to TCP/IP based streaming, by means of an experimental campaign that includes multiple channels (e.g., emulated Wi-Fi and LTE, real 3G/4G traces), multiple clients (homogeneous vs heterogeneous mixture, synchronous vs asynchronous arrivals) and carefully selected DAS adaptation logics to cover the broad families of available adaptation algorithms. We also warn about potential pitfalls that are nonethelesseasily avoidable.Second, we show how network assistance helps im- proving the users’ quality of experience. To do so, we leverage the in-network caching feature of ICN and propose a simple periodical network signal from the cache (i.e., per-quality hit ratio) to be exploited by DAS adaptation logic to enhance further the user’s quality of experience by avoiding the known cache-induced quality oscillations. We confirm the soundness of our approach through experiments.Finally, as live multimedia delivery is gaining momentum, we propose hICN-RTC by integrating hICN (hybrid ICN), an ICN-in-IP solution, to WebRTC and we design RICTP (Realtime Information Centric Trans- port Protocol), a content-aware transport that minimizes the communication latency. Although still in development, the results we gathered from early experiments are promising as they show that hICN-RTC scales with the number of active speakers rather than the total number of participants
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Kim, Taehyun. "Scalable Video Streaming over the Internet." Diss., Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/6829.
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The objectives of this thesis are to investigate the challenges on video streaming, to explore and compare different video streaming mechanisms, and to develop video streaming algorithms that maximize visual quality. To achieve these objectives, we first investigate scalable video multicasting schemes by comparing layered video multicasting with replicated stream video multicasting. Even though it has been generally accepted that layered video multicasting is superior to replicated stream multicasting, this assumption is not based on a systematic and quantitative comparison. We argue that there are indeed scenarios where replicated stream multicasting is the preferred approach.
We also consider the problem of providing perceptually good quality of layered VBR video. This problem is challenging, because the dynamic behavior of the Internet's available bandwidth makes it difficult to provide good quality. Also a video encoded to provide a consistent quality exhibits significant data rate variability. We are, therefore, faced with the problem of accommodating the mismatch between the available bandwidth variability and the data rate variability of the encoded video. We propose an optimal quality adaptation algorithm that minimizes quality variation while at the same time increasing the utilization of the available bandwidth.
Finally, we investigate the transmission control protocol (TCP) for a transport layer protocol in streaming packetized media data. Our approach is to model a video streaming system and derive relationships under which the system employing the TCP protocol achieves desired performance. Both simulation results and the Internet experimental results validate this model and demonstrate the buffering delay requirements achieve desired video quality with high accuracy. Based on the relationships, we also develop realtime estimation algorithms of playout buffer requirements.
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Brown, Herbert Franklin III. "Students' performance on a paper-mediated versus multimedia tutorial for learning networking concepts." Diss., Virginia Tech, 1996. http://hdl.handle.net/10919/40324.
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This study was designed to determine the degree to which learner affective and personal characteristics affect student achievement through multimedia and paper-mediated
instruction. Two research questions were examined: (a) Is there a difference in gain between pretest and post test for the paper-mediated instruction group and the multimedia instruction group; (b) What is the effect of paper-mediated and multimedia instruction on achievement, when controlling for affective and personal characteristics? The statistical procedures used to examine the research questions were dependent t-tests and analysis of covariance.
Participants were 61 students from four classes enrolled in introductory computer classes in a high school in the Roanoke region of Virginia. The classes were randomly assigned to either a paper-mediated or multimedia treatment. Procedures involved having the participants from both groups complete five stages, either on paper or on the computer, based on group assignment. First, they completed a personal characteristics form. Second, they completed an attitude toward computers Likert-type scale, consisting of four subscales (anxiety, confidence, liking, usefulness). Third, they completed a 20-question pretest on networking terminology. Fourth, they reviewed instructional material in either a paper or multimedia presentation form. Upon completion of the paper or multimedia computer tutorial, the participants completed a 20-item posttest on networking terminology.
Based on the results of two dependent t-tests on the pretest and posttest for each
treatment group, students did realize a gain in achievement from the pretest to posttest in
both groups. In testing research question two, the analysis of covariance revealed a
significant treatment effect and gender as a significant covariate. Students in the paper-mediated group performed better than those in the multimedia group. Females performed
higher regardless of the treatment group.Ph. D.
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Chung, Edward Chi-Fai. "Quality of service analysis for distributed multimedia systems in a local area networking environment." Ohio : Ohio University, 1996. http://www.ohiolink.edu/etd/view.cgi?ohiou1174610545.
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Begen, Ali C. "Enhancing the Multimedia Experience in Emerging Networks." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/14010.
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As multimedia processing and networking technologies, products and services evolve, the number of users communicating, collaborating and entertaining over the IP networks is growing rapidly. With the emergence of pervasive and ubiquitous multimedia services, this proliferation creates an abundant increase in the amount of the Internet backbone traffic. This brings the problem of efficient transmission of real-time and time-sensitive media content to the fore. Effective multimedia services demand appropriate application-specific and media-aware solutions, without which the full benefits of such services will not be realized. Poor approaches often lead to system performance degradations such as unacceptable presentation quality perceived by the users, possible network collapses due to the high-bandwidth nature of the multimedia applications, and poor performance observed by other data-oriented applications due to the unresponsiveness of multimedia flows.
From a networking perspective, traditional approaches consider the application data as "sacred" and do not differentiate any part of it from the rest. While this keeps the data-delivery mechanisms, namely, the transport-layer protocols, as plain as possible, it also precludes these mechanisms from interpreting the media content and tailoring their actions according to the importance of the content. Given that this naive approach cannot satisfy the specific needs of each and every one of the today's emerging applications ranging from videotelephony to video-on-demand, from distance education to telemedicine, from remote surveillance to online video gaming, the study of Multimedia Transport Protocols (MMTP) is overdue.
An MMTP solution basically integrates the multimedia content information into the responsible data-delivery mechanisms along with the requirements of the invoking application and network characteristics to deliver the highest level of service quality. In other words, an MMTP solution offers a unified environment where all cooperating protocol components interact with each other and make the best use of this collaboration to fulfill their respective duties. The focus of this thesis is on the design and evaluation of a set of end-to-end and system-level MMTP solutions for scalable, reliable, and high quality multimedia services in ever-changing, complex and heterogeneous computing and communication environments.
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Gupta, Smrati. "Contributions on networking techniques for wireless relay channels." Doctoral thesis, Universitat Autònoma de Barcelona, 2014. http://hdl.handle.net/10803/283583.
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En los últimos años, el relaying ha surgido como una poderosa técnica para mejorar la cobertura y el rendimiento de las redes inalámbricas. En consecuencia, la creciente demanda de servicios basados en redes inalámbricas con relays, ha conducido al desarrollo de técnicas de networking nuevas y eficientes. Estas técnicas pueden ser utilizadas en diferentes capas de la pila de protocolos y pueden ser optimizadas para cumplir diversos objetivos, como la maximización del rendimiento, mejora de cobertura, etc. en el marco de las redes existentes. En esta tesis se presenta una serie de contribuciones para las técnicas de networking, utilizando una variedad de herramientas a fin de maximizar el rendimiento de la red y satisfacer las demandas de los usuarios. Para hacer contribuciones efectivas y concretas, hemos seleccionado problemas exigentes en varios aspectos de las técnicas avanzadas de networking en redes inalámbricas y presentamos soluciones hábiles a éstos. En particular, hacemos uso de diferentes herramientas como network coding, técnicas de transmisión cognitiva y teoría de juegos, con el fin de diseñar soluciones para las redes inalámbricas modernas con relays. Las principales técnicas de networking, para diferentes capas de la pila de protocolos, presentadas en esta tesis son las siguientes.
En primer lugar, a nivel de capa física, maximizamos el rendimiento de la red mediante la herramienta de network coding en la capa física (PNC) basada en el método compute and forward (CF) en redes con relays. Se sabe que las tasas máximas alcanzables en la transmisión basada en CF están limitadas debido a las aproximaciones de los canales en el relay. Proponemos el Integer Forcing Precoder (IFP), para superar esta limitación. Con la ayuda del IFP, demostramos una posible implementación de la prometedora técnica de CF, que allanaría el camino para un diseño avanzado del precodificador para maximizar el rendimiento de la red.
En segundo lugar, en la capa de enlace de la red, maximizamos el rendimiento con el uso de dos herramientas diferentes: (a) network coding junto con una optimización cross-layer condicionada a la calidad de experiencia (QoE), (b) técnicas de transmisión cognitiva. En (a), utilizamos el network coding en la capa de enlace, en coherencia con la optimización cross-layer y demostramos la existencia de compromisos importantes entre rendimiento y QoE alcanzable. Por otra parte, proponemos utilizar factores realistas como la ubicación de los usuarios finales en la red de relays para optimizar el servicio obtenido en presencia de tales compromisos. En (b), utilizamos las técnicas de transmisión cognitiva para analizar la mejora en el rendimiento de una red inalámbrica particular, el sistema de satélites duales (DSS). Además, presentamos un análisis taxonómico exhaustivo de las diferentes técnicas cognitivas en DSS. Con la ayuda de este trabajo, proponemos posibles diseños para las técnicas "inteligentes" de networking, las cuales constituyen una plataforma para maximizar el rendimiento de futuras redes inalámbricas con relays.
En tercer lugar, en la capa de transporte-aplicación, maximizamos no sólo el rendimiento, si no también una utilidad conjunta compuesta de rendimiento, QoE y coste del servicio, utilizando herramientas de la teoría de juegos. Consideramos una aplicación de video transmitida por una red inalámbrica en la que las usuarios que compiten tratan de maximizar sus utilidades. Modelamos y predecimos los puntos de equilibrio alcanzados usando repetidas formulaciones del juego, teniendo en cuenta factores reales como la tolerancia de los usuarios y el criterio óptimo de Pareto. Con la ayuda de este trabajo, se demuestra el potencial del uso de técnicas repetidas de teoría de juegos en redes inalámbricas, prometiendo así mejorar el rendimiento del sistema existente de manera categórica. En general, esta tesis presenta propuestas prácticas y efectivas junto con un análisis holístico para diferentes aspectos en el desarrollo de técnicas modernas de networking para redes inalámbricas con relays.In the recent years, relaying has emerged as a powerful technique to improve the coverage and throughput of wireless networks. Consequently, the growing demands of the wireless relay networks based services has led to the development of novel and efficient networking techniques. These techniques can be used at different layers of the protocol stack and can be optimized to meet different objectives like throughput maximization, improving coverage etc. within existent networking framework. This thesis presents a series of contributions towards the networking techniques using a variety of tools in order to maximize the throughput of the network and satisfy the user demands. To make effective and concrete contributions, we have selected challenging problems in various aspects of advanced wireless networking techniques and presented neat solutions to these problems. In particular, we make use of the different tools like network coding, cognitive transmission techniques and game theory in order to design networking solutions for modern wireless relay networks. The main contributions of this thesis towards networking techniques at different layers of the protocol stack are as follows. Firstly, at the physical layer, we maximize the throughput of the network using the tool of physical layer network coding (PNC) based on compute and forward (CF) in relay networks. It is known that the maximum achievable rates in CF-based transmission are limited due to the channel approximations at the relay. We propose the integer forcing precoder (IFP), which bypasses this maximum rate achievability limitation. With the help of IFP, we demonstrate a possible implementation of the promising scheme of CF thereby paving the way for an advanced precoder design to maximize network throughput. Secondly, at the link-network layer, we maximize throughput with the use of two different tools: (a) network coding along with Quality of Experience (QoE) driven cross-layer optimization and (b) cognitive transmission techniques. For (a), we use network coding at link layer in coherence with cross-layer optimization and prove the existence of crucial trade-offs between throughput and achievable QoE. Moreover, it is proposed to use the realistic factors such as positioning of the end users in the relay network to optimize the service obtained in presence of such trade-offs. For (b), we use the cognitive transmission techniques to analyze the improvement in throughput of a particular wireless network, namely Dual Satellite systems (DSS). Moreover, an exhaustive taxonomic analysis of the different cognitive techniques in DSS is presented. With the help of this work, the possible designs for 'intelligent' networking techniques are proposed, which form a platform for maximizing the throughput performance of future wireless, relay networks. Thirdly, at the transport-application layer, we maximize not only the throughput but a joint utility comprised of throughput, QoE and cost of service, with the use of game theoretical tools. We consider a video application relayed over a wireless network and competing users trying to maximize their utilities. We model and predict the equilibriums achieved using repeated game formulations taking into account the realistic factors such as tolerance of the users and pareto optimality. With the help of this work, the potential of use of repeated game theoretical tools in wireless networks is proved which also promises to improve the existing system performance categorically. Overall, this thesis presents effective and practical propositions along with holistic analysis towards different aspects of development of modern networking techniques for wireless relay networks.
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Pallis, Evangelos M. "Towards the provision of high quality interactive multimedia services via a wireless broadband networking infrastructure." Thesis, University of East London, 2002. http://roar.uel.ac.uk/3593/.
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This thesis contributes to the concept of wireless broadband access networking infrastructures by the design, implementation and evaluation of a novel network configuration that utilises a cellular architecture and provides symmetric interactivity over broadband downlink and uplink transmission channels. The design of the network configuration converges current wireless broadband access technologies, integrates all the appropriate hardware and software tools, and finally proposes a prototype wireless network, which is capable of providing access via the same platform to: i) high quality interactive multimedia services such as audio/video on demand (featuring bitrates higher than IMbps) over the TCP/IP stack, ii) fast Internet services (>lMbps), and iii) digital TV broadcasts (MPEG-2 format) based on the digital video broadcasting (DVB) standard. According to the proposed design, the network uses an innovative cellular architecture that utilises macro-cell configuration in the downlink and micro-cell configuration in the uplink. In this way, both digital TV broadcasts and the data for the interactive multimedia services (along with the Internet traffic) are multiplexed and transmitted to the user's neighbourhood (cell) wirelessly in the frequency band of 42GHz, by utilising the broadcasting delivery method and local multipoint distribution service (LMDS) technology. End-users of each cell may access the Internet or multimedia services via an intermediate communication node, the cell main node (CMN). The bi-directional communication between each user and the corresponding CMN is via 2.4GHz multichannel multipoint distribution service (MMDS) based links. These links provide for multiple user access under the IEEE 802.11 communication protocol, while enabling for user-to-user communication at rates of about 3Mbps (within a cell). For symmetric communication, each user returns to the service provider over the 42GHz frequency band via the intermediate CMN. The use of the 42GHz LMDS technology in both the uplink and downlink transmission paths enables symmetric interactivity, providing end-to-end data rates higher than IMbps. The network performance was evaluated using simulation tests (concerning the network throughput during multimedia services provision over the TCP/IP), the results of which indicated that the proposed architecture provides equal sharing of the system's resources during multiple users access. Based on the proposed design, this research involves the implementation of a prototype testbed that utilises a single-cell wireless network, incorporating a service provider about 5km away from the CMN, and a number of wireless users, geographically neighbouring the CMN. The implementation of the prototype system has been deployed in the frame of the E.U. funded project entitled CRABS (Cellular Radio Access for Broadband Services ACTS96/AC215). The service provider broadcasts a bouquet of live digital TV programmes (at a rate of 27.5Msymbols/s) multiplexed with interactive data information via the 42GHz link. All users within the cell receive the digital TV programmes over the 42GHz downlink. Users' requests for the provision of interactive services (i.e. fast Internet access, video/audio on demand) are carried from each user's premises to the CMN in the 2.4GHz band (IEEE 802.11 with frequency hopping) and subsequently to the service provider via a 42GHz uplink, at rates higher than IMbps. The implemented test-bed makes use of the TCP/IP stack, over which all interactive services are provided. In this respect, the research also involved performance evaluation tests on the test-bed regarding its network throughput. The work also examines the feasibility of the implemented test-bed to distribute non-live MPEG-2 encoded video streams (i.e. video on demand - VoD, audio on demand - AoD) over the TCP/IP stack and elaborates on the tradeoff between encoding rate, picture quality and network throughput. Towards this, a prototype objective picture quality evaluation method was developed, and experimental measurements verified this approach. The account of the research presented in this thesis is structured as follows: After a brief review and evaluation of relevant and currently available wireless access technologies, the thesis describes the design and the architecture of a prototype wireless broadband interactive access network capable of providing MPEG-2 multimedia services, distribute digital TV broadcasts and enable fast Internet access by converging MMDS and LMDS technologies. The research then evaluated the proposed design by conducting simulation tests, that concern the sharing of network resources during multimedia services' provision to single and multiple users, and a formula was derived, which provides an accurate estimation of the network throughput (in terms of available bit-rate) that an end-user accommodates, versus the number of concurrent end-users. Subsequently, the research discusses the implementation and evaluation of a prototype network, built according to the design specifications. In this respect, the work elaborated on the network performance during the provision of multimedia services (over the IP stack) for stationary and portable/mobile access by conducting a series of real condition tests (indoor and/or outdoor experiments) that were performed on the prototype network. Comparison of the real condition test-results with those of the simulation tests, confirmed the validity of the proposed design and network architecture and verified the capability of the prototype to distribute efficiently wireless broadband interactive audio-visual services and to share, equally, the network resources among all simultaneous users. The research then investigated the capability of the prototype network to deliver wirelessly (with the unicast method) MPEG-2 encoded video streams over the TCP/IP with satisfactory picture quality. An assessment was then made on the trade-off between picture quality and MPEG-2 video encoding rate, elaborating on the minimum rate that provides for acceptable picture quality. There is an examination of the trade-off between network resources and picture quality, and an evaluation of the minimum network throughput for satisfactory picture quality. Finally the research proposes an objective picture quality evaluation method and defines a threshold below which the picture quality (received by the end-user wirelessly over the TCP/IP stack in a VoD application) is acceptable. Based on this approach, real condition tests were undertaken that confirmed the capability of the proposed network to distribute wirelessly MPEG-2 video on demand streams over the TCP/IP with satisfactory picture quality. The thesis concludes by proposing further opportunities and directions for future exploitation and new configurations, including related topics for future research.
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Mehta, Anil. "MAC AND APPLICATION LAYER PROTOCOLS FOR HIGH PERFORMANCE NETWORKING." OpenSIUC, 2011. https://opensiuc.lib.siu.edu/dissertations/396.
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High-performance networking (HPN) is of significance today in order to enable next-generation applications using wired and wireless networks. Some of the examples of HPN include low-latency industrial sensing, monitoring and automation using Wireless Sensor Networks (WSNs). HPN however requires protocol optimization at many layers of the open system interface (OSI) network model in order to meet the stringent performance constraints of the given applications. Furthermore, these protocols need to be impervious to denial of service (DoS) and distributed DoS (DDoS) attacks. Some of the key performance aspects of HPN are low point-to-point and end-to-end latency, high reliability of transmitted frames and performance predictability under various network load situations. This work focuses on two discrete issues in designing protocols for HPN applications. The first research issue looks at the Medium Access Control (MAC) layer of the OSI network model for designing of MAC protocols that provide low-latency and high reliability for point-to-point communication under a WSN. Existing standards in this area are governed by IEEE 802.15.4 specification which defines protocols for MAC and PHY layers for short-range, low bit-rate, and low-cost wireless networks. However, the IEEE 802.15.4 specification is inefficient in terms of latency and reliability performance and, as a result, is unable to meet the stringent operational requirements as defined by counterpart wired sensor networks. Work presented under current research issue describes new MAC protocols that are able to show low-latency transmission performance under strict timing constants for power limited WSNs. This enhancement of the MAC protocols is named extended GTS (XGTS) contained under extended CFP (ECFP) and is published under the IEEE's 802.15.4e standard. The second research issue focuses on the application layer of the OSI network model to design protocols that enhance the robustness of the text based protocols to various traffic inputs. The purpose of this is to increase the reliability of the given text based application layer protocol under a varied load. Session Initiation Protocol (SIP) is used as a case study and the work aims to build algorithms that ensure that SIP can continue to function under specific traffic conditions, which would otherwise deem the protocol useless due to DoS and DDoS attacks. Proposed algorithms investigate techniques that enhance the robustness of the SIP against parsing attacks without performing a deep parse of the protocol data unit (PDU). The desired effect of this is to reduce the time spent in parsing the SIP messages at a SIP router and as a result increase the number of SIP messages processed per unit time at a SIP router.
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Yang, Yin-Wei. "Online multimedia communication system." CSUSB ScholarWorks, 2005. https://scholarworks.lib.csusb.edu/etd-project/2661.
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Online Multimedia Communication System is a project aimed at providing people the ability to store and share their multimedia files. The users and administrator can modify and view the files and database information from a normal web browser. Furthermore, this site offers a secure environment to keep all the users' information private.
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Li, Feng. "Treatment-Based Classi?cation in Residential Wireless Access Points." Digital WPI, 2014. https://digitalcommons.wpi.edu/etd-dissertations/295.
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IEEE 802.11 wireless access points (APs) act as the central communication hub inside homes, connecting all networked devices to the Internet. Home users run a variety of network applications with diverse Quality-of-Service requirements (QoS) through their APs. However, wireless APs are often the bottleneck in residential networks as broadband connection speeds keep increasing. Because of the lack of QoS support and complicated configuration procedures in most off-the-shelf APs, users can experience QoS degradation with their wireless networks, especially when multiple applications are running concurrently.
This dissertation presents CATNAP, Classification And Treatment iN an AP , to provide better QoS support for various applications over residential wireless networks, especially timely delivery for real-time applications and high throughput for download-based applications. CATNAP consists of three major components: supporting functions, classifiers, and treatment modules. The supporting functions collect necessary flow level statistics and feed it into the CATNAP classifiers. Then, the CATNAP classifiers categorize flows along three-dimensions: response-based/non-response-based, interactive/non-interactive, and greedy/non-greedy. Each CATNAP traffic category can be directly mapped to one of the following treatments: push/delay, limited advertised window size/drop, and reserve bandwidth. Based on the classification results, the CATNAP treatment module automatically applies the treatment policy to provide better QoS support.
CATNAP is implemented with the NS network simulator, and evaluated against DropTail and Strict Priority Queue (SPQ) under various network and traffic conditions. In most simulation cases, CATNAP provides better QoS supports than DropTail: it lowers queuing delay for multimedia applications such as VoIP, games and video, fairly treats FTP flows with various round trip times, and is even functional when misbehaving UDP traffic is present. Unlike current QoS methods, CATNAP is a plug-and-play solution, automatically classifying and treating flows without any user configuration, or any modification to end hosts or applications.
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Rudholm, Mikael. "Design of IP Multimedia Subsystem for Educational Purposes." Thesis, KTH, Radio Systems Laboratory (RS Lab), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-170045.
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Internet Protocol multimedia subsystem (IMS) is an architecture for services such as voice over Internet Protocol (VoIP) in IP based communication systems. IMS is standardized by the 3GPP standardization forum, and was first released in 2002. Since then IMS has not had the wide adoption by operators as first anticipated. As 3G already supported voice and video, the operators could not justify the expense of IMS. The current emergence of the fourth generation mobile communication system named Long Term Evolution (LTE) has, however, increased the need for knowledge of IMS and of creating services for it. LTE networks are IP only networks that provide low latency. In order to use LTE for making phone calls, VoIP technologies are needed. IMS is the architecture intended to be used for Voice over LTE (VoLTE). The need for tools for education within IMS was seen in 2006 by Enea Experts in Linköping, Sweden. The author of this thesis designed an IMS for educational purposes, but the project was never fully completed. This thesis will reexamine the design decisions previously made by the author. The requirements stated by the customer remain: that an IMS with basic signaling and logging should be easy to install, maintain, and evolve at a low cost. A literature study of IMS and VoLTE is presented to contribute with knowledge in these areas. The previous design and implementation made by the author is presented and analyzed. The third-party software that the previous implementation was based on is reexamined. Existing open source components are analyzed in order to identify how they can be used to solve the problem and to identify what remains to be developed in order to fulfill the requirements. New design suggestions, presented in today´s context, are proposed and verified using analytical reasoning and experiments. The outcome of the final work is new verified design decisions for the customer to use when implementing a new IMS for educational purposes. The thesis should also provide useful insights which instructors and students can use to teach and learn more about IMS.Internet Protocol multimedia subsystem (IMS) är en arkitektur för tjänster, som IP-telefoni (Voice over Internet Protocol, VoIP), i IP baserade kommunikationssystem. IMS standardi¬seras av standardiseringsforumet 3GPP och första utgåvan släpptes år 2002. IMS fick dock inte det breda genomslag bland operatörer som förväntats. Eftersom 3G redan hade stöd för tal och video kunde operatörerna inte se skäl till ytterligare utgifter för IMS. Den fjärde generationens mobila kommunikationssystem, Long Term Evolution (LTE) är helt IP-baserat och ger lägre fördröjningar i nätet. För att kunna ringa telefonsamtal via LTE krävs VoIP-teknik. IMS är en arkitektur avsedd för att användas för Voice over LTE (VoLTE). Den nuvarande utvecklingen av LTE har därför ökat behovet av kunskap om IMS och av utveckling av IMS-tjänster. Enea Experts i Linköping insåg behovet av verktyg för utbildning inom IMS år 2006. Författaren av det här examensarbetet designade därför ett IMS för utbildningssyfte. Projektet slutfördes dock aldrig. Syftet med examensarbetet är att ompröva de tidigare designbesluten. Kundens krav kvarstår: att ett IMS med grundläggande signalering och loggning bör vara enkelt att installera, enkelt att underhålla och möjligt att utveckla till en låg kostnad. Arbetet innehåller en litteraturstudie av IMS och VoLTE för att ge en inblick i dessa områden. Den tidigare designen och implementationen presenteras och analyseras. Tredjeparts mjukvara, som den tidigare implementationen baserades på, omprövas. Befintliga programvaror med öppen källkod analyseras i syfte att kartlägga hur de kan användas för att lösa uppgiften, samt att identifiera vad som återstår att utveckla för att uppfylla kraven. Nya beslut kring design presenteras och besluten verifieras med experiment och analytiskt resonemang. Resultatet av detta examensarbete innefattar nya verifierade beslut kring design som kunden kan använda vid utveckling av ett nytt IMS för utbildningssyfte. Arbetet erbjuder också värdefulla insikter som instruktörer och elever kan använda för att undervisa samt för att lära sig mer om IMS.
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Sadat, Mohammad Nazmus. "QoE-Aware Video Communication in Emerging Network Architectures." University of Cincinnati / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ucin162766498933367.
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Zaman, Faisal Ameen. "VN Embedding in SDN-based Metro Optical Network for Multimedia Services." Thesis, Université d'Ottawa / University of Ottawa, 2017. http://hdl.handle.net/10393/35933.
Full textAbstract:
Currently a growing number of users depend on the Edge Cloud Computing Paradigm in a Metro Optical Network (MON). This has led to increased competition among the Cloud Service Providers (CPs) to supply incentives for the user through guaranteed Quality of Service (QoS). If the CP fails to guarantee the QoS for the accepted request, then the user will move to another CP. Making an informed decision dynamically in such a sensitive situation demands that the CP knows the user's application requirements. The Software Defined Networking (SDN) paradigm enabled the CP to achieve such desired requirement. Therefore, a framework called Virtual Network Embedding on SDN-based Metro Optical Network (VNE-MON) is proposed in this Thesis. The use of SDN paradigm in the framework guarantees profit to the CP as well as QoS to the user.\par
The design concept of the SDN control plane, raises concerns regarding its scalability, reliability and performance compared to a traditionally distributed network. To justify concerns regarding the SDN, the performance of VNE-MON and its possible dependancy on the controller location is investigated. Several strategies are proposed and formulated using Integer Linear Programming to determine the controller location in a MON. Performance results from the assessment of the VNE-MON illustrates that it is more stable compare to GMPLS-based network. It is evident that the controller location's attributes have a significant effect on the efficacy of the accepted VN request.
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Chassot, Christophe. "Architecture de transport multimedia à connexions d'ordre partiel." Phd thesis, Institut National Polytechnique de Toulouse - INPT, 1995. http://tel.archives-ouvertes.fr/tel-00145820.
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Les travaux présentés dans ce mémoire ont pour cadre la recherche de nouveaux services et protocoles de Transport, aptes à supporter le transfert de données multimédia en tenant compte des exigences applicatives en termes de hauts débits et de synchronisation. L'approche proposée repose sur la définition et le développement d'un nouveau concept: la connexion d'ordre partiel (POC - Partial Order Connection), établissant un lien conceptuel entre les modes de service/protocole orientés-connexion tels que TCP, et sans connexion tels que UDP. Une POC est une connexion de bout en bout permettant de définir et de mettre en œuvre tous les services et protocoles d'ordre partiel entre deux entités communicantes ; dans une POC, la délivrance des données à l'utilisateur récepteur peut être effectuée dans un ordre différent de l'ordre de soumission de ces données par l'utilisateur émetteur: la différence (acceptable) entre ces deux ordres résulte de la définition, par l'utilisateur, d'un ordre partiel de délivrance lors de l'ouverture de la connexion. Une formalisation des mécanismes correspondants est proposée au moyen de la technique de description formelle Estelle. Les caractéristiques intrinsèques des différents média d'un flux multimédia ont conduit ces dernières années au développement d'architectures de communication intégrant la prise en compte des contraintes applicatives à différents niveaux conceptuels, et notamment au niveau Transport du modèle OSI ; à partir d'une modélisation de ces contraintes utilisant le formalisme des réseaux de Petri (le modèle TSPN), l'auteur propose d'intégrer le concept de POC dans une architecture de Transport multimédia autorisant une prise en compte globale des contraintes d'ordre et de fiabilité d'un flux multimédia. Les mécanismes de gestion de l'ordre et de la fiabilité qui sont proposés permettent de définir un service de Transport multimédia offrant une hypothèse nouvelle aux utilisateurs vis à vis de la problématique de la synchronisation. Une étude de la faisabilité d'un protocole multimédia d'ordre partiel à l'aide des procédures XTP est finalement présentée: elle conclut en la possibilité d'une telle réalisation
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GARDUNO, BARRERA David Rafael. "A differentiated quality of service oriented multimedia multicast protocol." Phd thesis, Institut National Polytechnique de Toulouse - INPT, 2005. http://tel.archives-ouvertes.fr/tel-00009582.
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Les systèmes de communication multimédia modernes aspirent à fournir de nouveaux services tels que des communications multipoints. Néanmoins, l'apparition de dispositifs multimédias très diversifiés et le nombre croissant de clients ont révélé de nouveaux besoins pour les mécanismes et les protocoles. Dans une communication multimédia, les flux présentent des contraintes différentes et la QdS requise pour chaque flux n'est pas la même. De plus, dans une communication multipoint, tous les utilisateurs ne peuvent pas ou ne sont pas capables de recevoir la même QdS ; cette contrainte implique que les nouveaux mécanismes de communication doivent prendre en compte les besoins des utilisateurs pour fournir un service adéquat à chaque utilisateur, surtout pour éviter le gaspillage des ressources réseau. Cette thèse propose une architecture multipoint à QdS différentiée appelée M-FPTP. Basée sur des proxies client/serveur, elle relie plusieurs LANs multipoints à travers des liens point-à-point partiellement fiables. Cette architecture fournit une QdS différente à chaque LAN dépendant des besoins des utilisateurs. Pour ce faire, nous proposons un modèle du réseau appelé Arbre Hiérarchisé (AH) qui représente en même temps les performances du réseau et les contraintes de QdS des utilisateurs. Nonobstant, l'application de méthodes standard pour la création d'arbres sur un AH peut conduire à des problèmes de surcharge du degré de sortie dans la source. Pour résoudre ce problème, nous proposons alors un nouvel algorithme appelé Arbre de Plus Courts Chemins à Degré de Sortie Limité. Le déploiement de ce service nécessite, pour gérer les utilisateurs et le déploiement correct des proxies, un nouveau protocole appelé Protocole Simple de Session pour QdS multipoint. L'ensemble des solutions proposées a été modélisé, vérifié, validé et testé en utilisant UML 2.0 et l'outil TAU G2.
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Gomez, Montalvo Jorge Ricardo. "A multimedia ontology-driven architecture for autonomic quality of service management in home networks." Phd thesis, INSA de Toulouse, 2012. http://tel.archives-ouvertes.fr/tel-00752389.
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Dans le contexte actuel de l'Internet, un enjeu de recherche majeur est de permettre aux applications et à leurs utilisateurs de disposer de systèmes de communication offrant une qualité de service (QdS) optimale. Ceci en fonction des ressources machine et réseau disponibles, dont les capacités et les performances, hétérogènes et variables, ne sont pas connues à l'avance. Le provisionnement optimal de la QdS dans ces futurs systèmes de communication autonomes nécessite d'une part la caractérisation des services et des ressources de communication disponibles, et d'autre part la prise en compte des expressions des besoins et des préférences des différents acteurs du système (utilisateurs, fournisseurs des services, etc.). Le sujet de la thèse porte sur la définition d'un cadre sémantique de QdS basé sur les ontologies pour la caractérisation des ressources et des services de communication dans le but de fournir la meilleure QdS au regard des besoins et des préférences des utilisateurs. Ce cadre sera utilisé dans la définition des objectifs et des contraintes de QdS et dans l'élaboration de modèles de décision. L'ensemble sera utilisé pour la mise en œuvre de QdS dans les systèmes de communication autonomes situés dans un contexte de réseaux domestiques.
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Shakya, Rosish. "Optimal Placement of Video Caching Routers for Minimization of Retransmission Delay." University of Akron / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=akron1306429551.
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Travěnec, Jiří. "Systém pro záznam streamovaného videa z IP kamer." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2015. http://www.nusl.cz/ntk/nusl-235021.
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This diploma thesis focuses on multimedia streaming from IP cameras. Its main goal is to explain theoretical background of real-time streaming via computer networks, and describe development of a recording system. This recording system is meant to be used mainly in schools for lecture recording purposes. The thesis contains description on how a recording server application and web-based management system were developed. The theoretical part explains topics related to multimedia streaming, networking, and multimedia procesing, such as real-time streaming protocols, encoding, compression, network latency, network congestion and many others.
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Lin, Dada. "Wissensmanagement Reloaded - Ein Ordnungsrahmen für den systemischen Umgang mit Wissen im Enterprise 2.0." Master's thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-39354.
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Gegenstand dieser Arbeit ist die Konstruktion eines Ordnungsrahmens für den systemischen Umgang mit Wissen im Enterprise 2.0. Dieser Ordnungsrahmen zeigt Einsatzpotentiale und Handlungsfelder des Enterprise 2.0-Konzepts für Wissensmanagement systematisch auf und vermittelt ein Verständnis über die Zusammenhänge zwischen den Gestaltungsdimensionen Mensch, Organisation und Technologie im speziellen Fall des Enterprise 2.0.
Ergänzend zu den theoretisch erarbeiteten Aspekten wird der konzipierte Ordnungsrahmen verwendet, um die Eignung eines realen Enterprise 2.0-Ansatzes (Wiki-Plattform) für Wissensmanagement zu bewerten.
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Chevalier, Fanny. "Reconnaissance de motifs dans des graphes : heuristique et applications." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2007. http://tel.archives-ouvertes.fr/tel-00286214.
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Cette thèse s'inscrit dans la problématique de la comparaison de graphes. Nous proposons dans la première partie de ce manuscrit plusieurs algorithmes de recherche de motifs similaires dans de grands graphes. La seconde partie de cette thèse traite de l'étude des arborescences de fichiers, structure de données pour laquelle la méthode initiale de reconnaissance de motifs a été développée. Nous présentons un modèle stochastique pour la génération aléatoire de structure arborescentes, basé sur les observations de l'étude statistique des données réelles. Enfin, nous détaillons deux adaptations de l'algorithme de reconnaissance de motifs similaires à des applications particulières. La première concerne la reconnaissance d'objets extraits de la video basse résolution pour l'indexation grossière. La deuxième application a été développée pour la visualisation de l'évolution de projets logiciels.
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Carré, Matthieu. "Systèmes de Recherche de Documents Musicaux par Chantonnement." Phd thesis, Ecole nationale supérieure des telecommunications - ENST, 2002. http://tel.archives-ouvertes.fr/tel-00001593.
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Avec l'explosion des données numériques disponibles (notamment via Internet), la question de l'accès aux documents reçoit depuis quelques années une attention accrue. En effet, l'indexation des documents, traditionnellement fondée sur la description textuelle, atteint rapidement ses limites en particulier lorsque le contenu concerné est musical. Cette thèse focalise sur la recherche de documents musicaux par chantonnement. Nous présentons un système qui permet de retrouver une musique à partir d'un extrait chanté par l'utilisateur. Sa réalisation a nécessité deux études préalables qui ont comblé quelques lacunes d'un domaine de recherche encore jeune. Nous nous sommes intéressés, d'une part, à la "justesse" des mélodies chantonnées (par l'étude de 500 requêtes), et d'autre part, à certains aspects de la similarité mélodique (par la réalisation de tests subjectifs).
Grâce à ces études, nous proposons un système de recherche original et performant. Refusant une description tempérée de la requête (i.e. comportant une quantification des notes au demi-ton), le système proposé retrouve plus de 90% des documents musicaux attendus, pour une taille de requête moyenne (13 notes). La base de données consultée est constituée de 20.000 fichiers MIDI (40 millions de notes indexées). Le temps d'attente est acceptable puisqu'il ne faut que quelques secondes au système pour fournir sa réponse (i.e. la liste des documents les plus similaires à la requête, ceux-ci étant classés par ordre de similarité).
Cette thèse apporte également une aide dans le processus d'évaluation de la qualité de tels systèmes. En effet, nous proposons une modélisation de l'imprécision des mélodies chantonnées. Celle-ci permet la génération de requêtes artificielles qui peuvent être substituées aux requêtes réelles lors du test de systèmes. Cette alternative permet d'alléger le processus de test tout en conservant une stimulation réaliste.
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Moreira, Rodrigo. "Um orquestrador flexível de recursos de rede e computação para o aprimoramento de qualidade de serviço (QoS) em aplicações multimídia baseadas em funções virtualizadas de rede (NFV)." Universidade Federal de Uberlândia, 2017. https://repositorio.ufu.br/handle/123456789/19743.
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Pessoas e organizações ao redor do globo utilizam aplicações multimídia para interação e comunicação. Existe notável crescimento de tráfego característico dessas aplicações, uma vez que há convergência de voz e dados para um modelo único de transporte. As redes de computadores, por suportar tais aplicações cadenciam desafios e oportunidades de negócios que os operadores têm aproveitado. Por outro lado, os usuários experimentam serviços com qualidades cada vez mais refinados, mesmo assim, existem aspectos que devem ser tratados para elevar a qualidade de experiência percebida pelos usuários ao consumir serviços ofertados sobre a internet. Métricas de QoS usualmente são baseadas nos usuários ou na rede, por isso, conceitos como NFV e SDN permitem aprimorar e expandir a perspectiva de oferta de uma camada de abstração para desenvolvimento de soluções flexíveis, que visam lidar com aplicações multimídia ofertadas em nuvem. Não obstante, a construção dessas soluções deve ser calcada em aspectos intrínsecos ao conceito de Internet do Futuro que preconiza soluções virtualizadas, flexíveis, convergentes, escaláveis, orientadas a contexto, seguras e melhor gerenciadas.
Este trabalho propõe uma abordagem para mitigar a distância das aplicações com os recursos de rede e computação. Usualmente as aplicações desconhecem características de hardware sobre o qual elas operam; quanto a rede, mesmo com esforços em vários níveis da pilha de protocolos, desconhece especificidades das aplicações em execução. Há também dificuldade de gerenciamento global de recursos, integração de políticas e acordos de serviço entre operadores. O trabalho visa adicionar uma camada de gerenciamento para elevar os níveis de QoS para aplicações multimídia baseadas em NFV. Para realizar isso, é proposto uma entidade que atua no plano de dados e controle, capaz de orquestrar recursos de rede e de computação simultaneamente para aprimorar QoS em aplicações multimídia. A incorporação dessa entidade conquista melhoramento de QoS por meio da oferta de resiliência na comunicação fim-a-fim de entidades consumidoras dessas aplicações, provê um balanceamento de carga adequado a fim de não comprometer parâmetros de QoS como tempo de resposta, provê escalabilidade sob demanda, promove o conceito de inspeção de pacotes para segmentação de políticas de rede orientada à aplicação, finalmente realiza a separação de plano de dados e controle. A construção e experimentação da solução permitiu diminuir tempos de resposta nas aplicações multimídia; a solução reagiu adequadamente frente a cargas de trabalho heterogêneas no sentido de prover confiabilidade para garantia de QoS; também, o conceito de inspeção de pacotes foi capaz de atuar para diminuir a distância que as aplicações possuem da rede e o hardware sobre o qual elas operam.People and organizations around the globe use multimedia applications for interaction and communication. There is notable traffic growth characteristic of these applications since there is a convergence of voice and data for a single transport model. Computer networks, because they support such applications, meet the challenges and business opportunities that operators have taken advantage of. On the other hand, users use services with increasingly refined qualities, nevertheless, there are aspects that must be addressed to raise the quality of experience for users when consuming services offered over the internet. QoS metrics are usually user-based or network-based, hence concepts such as NFV and SDN allow to improve and expand the perspective of offering an abstraction layer for the development of flexible solutions that deal with multimedia applications offered in the cloud. Nevertheless, the construction of these solutions must be based on intrinsic aspects to the Future Internet concept that advocates virtualized solutions, flexible, convergent, scalable, context-aware, secure and better managed. This dissertation proposes an approach to mitigate the distance of the applications with the resources of compute and network. Usually, the applications are unaware of the hardware characteristics on which they operate, as for the network, even with several efforts at various levels of the protocol stack, the specificities of running applications are unknown. There is also challenges of managing global resources, integrating policies and service agreements between operators. This work aims to add a management layer to raise the levels of QoS for multimedia applications based on NFV. To accomplish this, an entity that acts on the data and control plane is proposed, capable of orchestrating network and computing resources simultaneously to enhance QoS in multimedia applications. The incorporation of this entity achieves QoS improvement through resiliency in the end-to-end communication of the consumer entity of these applications, provides adequate load balancing in order to avoid compromising QoS parameters such as response time, provides on-demand scalability, improves the concept of package inspection for the segmentation of application-oriented network policies, and finally performs the separation of data and control plane. The construction and experimentation of the solution allowed to reduce response times in the multimedia applications. The solution reacted adequately to heterogeneous workloads in order to provide reliability for QoS guarantee. Furthermore, the concept of packet inspection was able to act to decrease the distance that the applications have from the network and the hardware on which they operate.
Dissertação (Mestrado)
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Jouve, Christine. "Représentation des connaissances pour les problèmes de conception. Application à un système à base de connaissances pour la conception de réseaux informatiques : NEST." Phd thesis, Ecole Nationale Supérieure des Mines de Saint-Etienne, 1992. http://tel.archives-ouvertes.fr/tel-00832243.
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Réalisée dans le cadre d'un projet Esprit Il, cette thèse a eu pour objectif principal la réalisation d'un système à base de connaissances pour la conception de réseaux. A travers le développement de ce système appelé NEST (pour Network design Expert SysTem), deux principaux ax~s de recherche ont été entrepris : la modélisation d'une activité de conception pour laquelle 1 'intelligence artificielle a relativement peu de théories et la configuration de réseaux locaux pour laquelle peu de systèmes experts ont été conçus. L'originalité de l'approche est d'avoir employé plusieurs formalismes :un modèle centré objets pour les concepts de base, prolog pour l'implémentation des connaissances opératoires et une architecture constituée de plans de contrôle 1 tâches 1 sous-tâches 1 modules. En outre, implémenter un système à base de connaissances nécessite de représenter les connaissances propres au domaine d'application choisi. Une étude a été menée afin d'établir l'état de l'art en ce qui concerne la représentation des connaissances. Certains points particuliers ont été développés tels que la programmation orientée objets et les méthodes de représentation des connaissances employées pour résoudre des problèmes de conception. Le développement de NEST fait partie prenante du projet MMI2 dont le but est la réalisation d'une interface multi-modes pour des systèmes à base de connaissances. Les différents modes de communication permis par cette interface sont les langues naturelles (anglais, français, espagnol), le graphique, le gestuel et un langage de commande. Un premier démonstrateur intégrant ces modes et le système NESTa été présenté en Octobre 1991 et lors de la conférence Esprit en Novembre 1991 à Bruxelles.
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Zeghilet, Houda. "Le routage dans les réseaux de capteurs multimédia." Phd thesis, Université de Lorraine, 2013. http://tel.archives-ouvertes.fr/tel-00922266.
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Aujourd'hui, la prolifération de matériel peu coûteux tels que les caméras et les microphones capables de capturer du contenu multimédia de façon ubiquitaire a conduit à l'émergence des réseaux de capteurs sans fil multimédia/vidéo (RCSFM /RCSFV). En conséquence, un grand éventail d'applications peuvent être projetées dans de nombreux domaines de la vie de tous les jours. Par rapport aux réseaux de capteurs traditionnels (RCSF), les RCSFVs présentent des défis uniques principalement en raison de la grande quantité de données à capturer et à transmettre au-dessus d'un réseau contraint en ressources. Un certain niveau de qualité de service peut être exigé en termes de délai, bande passante, gigue, fiabilité, qualité de perception de la vidéo, etc. Dans ce travail, nous visons le problème du routage de données vidéo dans un RCSF. De nombreux protocoles de routage ont été proposés dans la littérature. Ils peuvent être qualifiés de plat ou hiérarchique en vue de l'organisation du réseau. Dans une topologie plate, tous les noeuds ont les mêmes fonctionnalités où chacun peut participer au processus de routage. Cependant, dans une architecture hiérarchique, les capteurs sont organisés en groupes (clusters) permettant une plus grande évolutivité, moins d'énergie consommée et donc une plus longue vie pour l'ensemble du réseau. Parmi les protocoles de routage existants, peu considèrent spécifiquement la transmission de données intensives comme la vidéo. Dans ce travail, nous avons d'abord proposé un protocole de routage hiérarchique appelé ELPC (Energy Level Passive Clustering) dont l'objectif principal est d'améliorer la durée de vie du réseau en présence de flux vidéo. Ceci est obtenu grâce à l'équilibrage des charges au moment de la construction de la topologie où le rôle de tête de groupe est alterné entre les noeuds candidats en fonction de leur niveau d'énergie. La deuxième contribution consiste en un protocole de routage multichemin qui prend les interférences inter-chemin en considération. En effet, en permettant la transmission de plusieurs flux concurrents, le délai de bout en bout se trouve réduit et les besoins de l'application en termes de bande passante peuvent être satisfaits. Au lieu de supprimer complètement les interférences, notre protocole de routage multichemin tente de les minimiser en se basant sur l'ajout d'informations supplémentaires sur les noeuds voisins dans les messages de construction de la topologie. De plus, nous proposons un schéma de files d'attente à priorités multiples où l'influence des types de données dans une vidéo est considérée. Les résultats des simulations montrent que l'utilisation de chemins moins interférents combinée à un régime de multipriorité permet une meilleure qualité vidéo.
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Hassan, Hassan. "Modélisation et analyse de performances du trafic multimédia dans les réseaux hétérogènes." Phd thesis, Université Paul Sabatier - Toulouse III, 2006. http://tel.archives-ouvertes.fr/tel-00130060.
Full textAbstract:
Ces travaux concernent la modélisation et l'analyse de performances du trafic et des applications multimédia dans les réseaux hétérogènes. Le trafic IP agrégé et les applications audio, vidéo et données sont étudiés. Cette étude nous conduit à proposer un modèle générique et hiérarchique pour la représentation des sources de trafics multimédia qui permet de décrire les applications multimédia d'une façon simple, précise et générique. Le modèle générique est implémenté et constitue le noyau d'un outil de modélisation et simulation des sources de trafics. Une caractérisation du trafic IP issu d'applications multimédia est conduite en utilisant les modèles développés avec cet outil. Particulièrement, la problématique de la modélisation des sources de trafics agrégées est adressée, et des modèles agrégés simples sont déduites pour la superposition des sources de trafics audio, vidéo et données. Le trafic agrégé de type TCP présente des propriétés statistiques variables en fonction du taux de pertes de paquets sur le réseau à cause du contrôle en boucle fermée imposé par TCP. Un nouveau modèle analytique du protocole TCP basé sur la théorie différentielle du trafic est ensuite proposé. Ce modèle permet une représentation fiable du trafic TCP tout en étant très performant sur les réseaux à grande échelle. Finalement, une extension de l'architecture du protocole SIP est présentée afin de permettre une gestion de la qualité d service au niveau session. Les mécanismes proposés reposent sur l'ordonnancement stochastique des sessions et l'allocation de la bande passante par des approches d'évaluation de bande passante équivalente. Cette dernière technique rend possible l'utilisation des formules d'Erlang dans les réseaux à commutation de paquets
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Hounkonnou, Carole. "Auto-diagnostic actif dans les réseaux de télécommunications." Phd thesis, Université Rennes 1, 2013. http://tel.archives-ouvertes.fr/tel-00932834.
Full textAbstract:
Les réseaux de télécommunications deviennent de plus en plus complexes, notamment de par la multiplicité des technologies mises en œuvre, leur couverture géographique grandissante, la croissance du trafic en quantité et en variété, mais aussi de par l'évolution des services fournis par les opérateurs. Tout ceci contribue à rendre la gestion de ces réseaux de plus en plus lourde, complexe, génératrice d'erreurs et donc coûteuse pour les opérateurs. On place derrière le terme " réseaux autonome " l'ensemble des solutions visant à rendre la gestion de ce réseau plus autonome. L'objectif de cette thèse est de contribuer à la réalisation de certaines fonctions autonomiques dans les réseaux de télécommunications. Nous proposons une stratégie pour automatiser la gestion des pannes tout en couvrant les différents segments du réseau et les services de bout en bout déployés au-dessus. Il s'agit d'une approche basée modèle qui adresse les deux difficultés du diagnostic basé modèle à savoir : a) la façon d'obtenir un tel modèle, adapté à un réseau donné à un moment donné, en particulier si l'on souhaite capturer plusieurs couches réseau et segments et b) comment raisonner sur un modèle potentiellement énorme, si l'on veut gérer un réseau national par exemple. Pour répondre à la première difficulté, nous proposons un nouveau concept : l'auto-modélisation qui consiste d'abord à construire les différentes familles de modèles génériques, puis à identifier à la volée les instances de ces modèles qui sont déployées dans le réseau géré. La seconde difficulté est adressée grâce à un moteur d'auto-diagnostic actif, basé sur le formalisme des réseaux Bayésiens et qui consiste à raisonner sur un fragment du modèle du réseau qui est augmenté progressivement en utilisant la capacité d'auto-modélisation: des observations sont collectées et des tests réalisés jusqu'à ce que les fautes soient localisées avec une certitude suffisante. Cette approche de diagnostic actif a été expérimentée pour réaliser une gestion multi-couches et multi-segments des alarmes dans un réseau IMS.
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Ye, Fang-Dai, and 葉芳岱. "Implementation of QOS of multimedia CAI networking environment." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/50558612588066931915.
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Oliveira, Tiago Alexandre Soares. "Multimedia content distribution optimization using software-defined networking." Master's thesis, 2018. http://hdl.handle.net/10773/25983.
Full textAbstract:
The general use of Internet access and user equipments, such as smartphones, tablets and personal computers, is creating a new wave of video content consumption. In the past two decades, the Television broadcasting industry went through several evolutions and changes, evolving from analog to digital distribution, standard definition to high definition TV-channels, form the IPTV method of distribution to the latest set of technologies in content distribution, OTT. The IPTV technology introduced features that changed the passive role of the client to an active one, revolutionizing the way users consume TV content. Thus, the clients’ habits started to shape the services offered, leading to an anywhere and anytime offer of video content. OTT video delivery is a reflection of those habits, meeting the users’ desire, introducing several benefits
discussed in this work over the previous technologies. However, the OTT type of delivery poses several challenges in terms of scalability and threatens the Telecommunications Operators business model, because OTT companies use the Telcos infrastructure for free. Consequently, Telecommunications Operators must prepare their infrastructure for future demand while offering new services to stay competitive. This dissertation aims to contribute with insights on what infrastructure changes a Telecommunications Operator must perform with a proposed bandwidth forecasting model. The results obtained from the forecast model paved the way to the proposed video content delivery method, which aims to improve users’ perceived Quality-of-Experience while optimizing load balancing decisions. The overall results show an improvement of users’
experience using the proposed method.A generalização do acesso à Internet e equipamentos pessoais como smartphones, tablets e computadores pessoais, está a criar uma nova onda de consumo de conteúdos multimedia. Nas ultimas duas décadas, a indústria de transmissão de Televisão atravessou várias evoluções e alterações, evoluindo da distribuição analógica para a digital, de canais de Televisão de definição padrão para alta definição, do método de distribuição IPTV, até ao último conjunto de tecnologias na distribuição de conteúdos, OTT. A tecnologia IPTV introduziu novas funcionalidades que mudaram o papel passivo do cliente para um papel activo, revolucionando a forma como os utilizadores consumem conteúdos televisivos. Assim, os hábitos dos clientes começaram a moldar os serviços oferecidos, levando à oferta de consumo de conteúdos em qualquer lugar e em qualquer altura. A entrega de vídeo OTT é um reflexo destes hábitos, indo ao encontro dos desejos dos utilizadores, que introduz inúmeras vantagens sobre outras tecnologias discutidas neste trabalho. No entanto, a entrega de conteúdos OTT cria diversos problemas de escalabilidade e ameaça o modelo de negócio das Operadoras de Telecomunicações, porque os fornecedores de serviço OTT usam a infraestrutura das mesmas sem quaisquer custos. Consequentemente, os Operadores de Telecomunicações devem preparar a sua infraestrutura para o consumo futuro ao mesmo tempo que oferecem novos serviços para se manterem competitivos. Esta dissertação visa contribuir com conhecimento sobre quais alterações uma Operadora de Telecomunicações deve executar com o modelo de previsão de largura de banda proposto. Os resultados obtidos abriram caminho para o método de entrega de conteúdos multimedia proposto, que visa ao melhoramento da qualidade de experiência do utilizador ao mesmo tempo que se optimiza o processo de balanceamento de carga. No geral os testes confirmam uma melhoria na qualidade de experiência do utilizador usando o método proposto.
Mestrado em Engenharia de Computadores e Telemática
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Wang, Yuan-Ting, and 王元定. "Overlay Networking for Delay Bound Interactive Multimedia Services." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/83421161532818831140.
Full textAbstract:
碩士元智大學
資訊工程學系
92
Any to any source interactive multimedia services, such as video conference, demand multicasting network services and short communicate delay among end points. As for present Internet, the support of network layer multicasting across WAN is impossible. Recent focus is thus mostly on the application layer multicasting. In the past, very few researchers probe into the field of application layer multicasting on Δ-constrained. This thesis proposes an algorithm called Delay and Degree constrained Multicast Spanning Tree (D2MST) to establish a shared tree that makes end to end delay among high percentage of nodes within Δ-constrained. D2MST uses a novel concept of network center and gravity, based on which a cost function “merit” is defined to choose an appropriate root to start the construction of multicasting tree. The other cost function “power” is used therefore to choose which node can enter the multicasting tree first. An algorithm called Shortest Path with Degree Constrained (SPDC) is also proposed to connect a given node to the spanning tree so that the delay between node and node can conform to the need of Δ-constrained. The simulation results show that D2MST performs well and can establish a Δ-constrained overlay multicasting tree effectively.
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Su, Yuh-Loong, and 蘇郁隴. "Mcast: A Communication Engine for Multicast Multimedia Distribution Networking." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/32772812128183923479.
Full textAbstract:
碩士國立成功大學
資訊工程學系
86
The Internet explosion is driving the need for group multimedia applications,which provide multiple users with contented multimedia services, e.g., videodistribution and distance learning. The provision of group applications ismostly based on multicastcommunications, which can reduce the consumption of network resources. However, the characteristics of multicast and the delivery of multiple media streams induce many new problems in the design of networking architecture and system, and media synchronization controls. Thus, a communication engine, which is called Mcast, that can achievesmooth multimedia presentations with the temporal relation preservation amongmultiple media streams is proposed and developed. In this thesis, major issues involved in the design andimplementation of Mcast, such as multicast communication architecture andsynchronization control schemes for multiple-streams presentations, are discussedand resolved. According to the proposed communication architecture and synchronization control schemes, Mcast can be the middleware of multicast multimedia applications to smoothly present continuous and static media.
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HUANG, I.-CHI, and 黃奕齊. "Industrial Collaboration R&D Master Program of Multimedia and Networking Technology." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/9fqg8z.
Full textAbstract:
碩士國立臺北大學
多媒體與網路科技產業碩士專班
106
There are varies methods to do the indoor positioning, such as Zigbee, Bluetooth, WIFI…etc . However, most of methods are based on the phenomenon to adjust the value, but few are based on the basic reference point to make an improvement. This research, achieve the indoor positioning by evaluating the reference point. It uses two different sets of n(Traditional 1m and base group 1m) to do the actual measurement through the 9 point base plus three groups of evaluation points. There are three groups of evaluation point will have their own value of n, but since the distance are very close, so we get average value of three values to get nine set of value corresponding to different base. Then compare with distance from traditional n value, and through the 9 base weighted score to assessment the better reference point.
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Hsu, Ya-Hsuan, and 許雅瑄. "The Effects of Multimedia Materials on Vocational High School Students' Computer Networking Concepts Learning." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/46348622223087197630.
Full textAbstract:
碩士國立臺灣師範大學
資訊教育學系
98
The purpose of this study was to examine the effects of multimedia materials on vocational high school students’ computer networking concepts learning and on students’ attitude toward multimedia materials. Based on cognitive load theory, multimedia design principles were applied to develop three kinds of self-directed learning materials: (1) narrated animations with annotation, (2) narrated animations and (3) annotated illustrations. Through quasi-experimental design, the pre-test and post-test results of 77 students’ learning performance and their attitude toward computer networking concepts learning were collected and analyzed. The results showed that the use of narrated animations with annotation group’s learning performance was significantly better than the use of narrated animations group. But the use of narrated animations group’s learning performance was not significantly higher than the use of annotated illustrations group’s learning performance. The result of attitude questionnaire indicated that most students believe that animations and illustrations is helpful in learning computer network concepts. More than 90 percent of participants thought that the multimedia materials can help them learning computer network concept, and they are willing to keep learning about computer science using multimedia materials. In conclusion, multimedia material has a positive influence on the learning performance of vocational high school students in learning computer networking concepts.
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Ji, Guang. "VBR Video Streaming over Wireless Networks." Thesis, 2009. http://hdl.handle.net/1807/18771.
Full textAbstract:
Video streaming applications over wireless networks have turned out to be immensely popular recently. In this thesis, we first study the buffering schemes for the VBR video streaming in heterogeneous wireless networks. An analytical framework is presented to derive the expected number of jitters and average buffering delay. Through experimenting with a wide range of buffering schemes, we quantify the bene¯t of incorporating user location information in streaming over heterogeneous wireless networks. Second, we consider the delivery of scalable VBR video streams over wireless channels. We propose adaptive rate control algorithms to improve the combined system performance of video frame quality and playout smoothness based on the feedback information of wireless network estimation, buffer content and playback situation. The proposed adaptive rate control algorithms provide significantly improved streaming quality compared with the non-control policy.
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Yi, Jang-Tz, and 莊子儀. "A peer-to-peer based multimedia distribution service in wireless networking environments using move prediction." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/05141543488114773651.
Full textAbstract:
碩士國立高雄第一科技大學
電腦與通訊工程所
94
Abstract For a peer-to-peer based system, it is hard to manage a system with large amount of dynamic users efficiently. The problem to transmit the multimedia data with real time requirement over a peer-to-peer communication system remains as a challenge until now. In this thesis we propose a new method to build a peer-to-peer based system in wireless networking environments for providing multimedia distribution services. First we used the R-tree data structure to manage the users in the system and construct the multicast tree. Instead of using the Internet router that supports the multicast routing scheme, we suggest using unicast for each pair of peers consisting of a parent node of the multicast tree and the corresponding child node of the multicast tree to carry on the job of multimedia data transmission through the multicast tree. Basically, local grouping of users provide us a chance to propose a user movement prediction model to further improve the performance of the user management scheme. Two prediction models are added to the R-tree data structure to account for the case of large dynamic users in the system. Finally we analyze the two methods theoretically and implement them for performance simulation. Experimental results show the good performance of the system.
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Yan, You-Syun, and 顏佑勳. "A Multimedia Q&A Platform and Smartphone APP Design with Cloud Social Networking Via Example of Ship Breakdown." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/pz6n26.
Full textAbstract:
碩士國立高雄海洋科技大學
輪機工程研究所
102
This thesis proposes an interactive community image/video Q&A system which integrates multimedia communications, cloud database, and social networking. The proposed system has three main parts, the data server, smart phone APP, and the website. With the video/image sharing on community website, people can ask/answer questions which cannot be expressed in words. For example: a user can take a picture and ask “What kind is this butterfly?”, which question is difficult to describe only by text inputs. In this dissertation, the APP is developed in Android OS environment, database is built by MySQL, and the server is constructed by the Ubuntu. The website client and web content management are finished by the PHP language and Joomla, respectively. The phone connection adopts the Tomcat tool for multimedia data transmission. This proposed system can prompt the strength of the masses to answer a personal question, enrich teaching, and entertaining features. Finally, we will use the example for the breakdown of ship to show the practicability of the developed method in this thesis.
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Duda, Andrzej. "Modélisation, conception et réalisation de systèmes répartis." Habilitation à diriger des recherches, 1994. http://tel.archives-ouvertes.fr/tel-00005088.
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Ce document présente une synthèse des activités autour d'un thème central : informatique répartie. Dans la première partie sont présentés les travaux dans le domaine de l'évaluation de performances et les mesures de systèmes répartis. Dans un premier temps, nous étudions des primitives de synchronisation de type fork-join. Par la suite, nous analysons les performances des programmes parallèles et nous comparons des stratégies de duplication d'objets. Enfin, nous présentons une méthode d'estimation du temps global pour la mesure de performances des systèmes répartis. La deuxième partie concerne la conception et la réalisation de systèmes répartis. Nous commençons par spécifier les primitives de communication du projet Epsilon et nous poursuivons en présentant le travail effectué dans le cadre du projet Guide : la gestion de l'exécution répartie, les mécanismes d'invocation d'objets à distance, les protocoles de communication, la gestion des groupes d'objets et l'administration de sites. La troisième partie est consacrée aux aspects inhérents aux autoroutes de l'information du futur : la recherche de l'information sur grands réseaux et la représentation des données multimedia. En conclusion, nous présentons un projet de recherche s'inscrivant dans le domaine du multimedia réparti qui concerne le développement de l'infrastructure de l'information pour les réseaux futurs. Ce projet a pour objectif la conception et le développement des services communs et des outils pour faciliter la mise en oeuvre des applications multimedia distribuées.
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ANIS, Muhammad Moiz. "Retransmission coopérative de flux des données diffusion via les réseaux cellulaires." Phd thesis, 2014. http://tel.archives-ouvertes.fr/tel-00978769.
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Among the multimedia content distribution services to the handheld receivers, mobile TV is a popular service. Digital Video Broadcast (DVB) networks have high capacity and coverage to perform a mass multimedia content distribution. The conventional DVB networks are designed to cover fixed receivers, which have a roof antenna. The handheld receivers have different configurations which cause weaker link budgets. Generally, a broadcast system is unidirectional and it does not have a feedback channel to ensure the reception of the data at the receiver side. On the other hand, cellular networks have more reliable bidirectional links with the handheld receivers. Individual multimedia transmission to each handheld receiver generates a huge load in the cellular networks. In the specific example of mobile TV, it is not efficient to regenerate the same transmission load for each handheld receiver. In our thesis work, we consider a cooperation between the broadcast systems and the cellular networks for an efficient multimedia reception at the handheld receivers. We use the cellular network link for the retransmission of the lost packets from a multimedia broadcast data-flow reception. In this work we analyze the coverage for handheld receivers in a single frequency broadcast network. We specifically consider several outdoor and indoor scenarios in a DVB-T2 network. We analyze how a data flow is processed in DVB-T2 and propose a scheme for the identification of packets in the DVB transmission. The core contribution of our thesis work is the proposition of a Real-time Flow Repair (RFR) Service based on cellular network, which repairs any multimedia data-flow to the handheld receivers in real-time. The proposed RFR service is based on a light client-server application protocol, namely Constrained Application Protocol (CoAP). The RFR proposal is also supported by the analysis of the load generated in LTE Radio access network due to RFR service.
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Ferreira, Ana Paula Gonçalves. "In2Museum: nova plataforma multimédia para o Museu das Comunicações." Master's thesis, 2013. http://hdl.handle.net/10071/7786.
Full textAbstract:
No presente trabalho, pretendemos lançar reflexões e contributos para a discussão de um novo
conceito de plataforma multimédia, partindo da análise de diversos casos de referência. Deste modo,
apresenta-se o estudo que conduziu ao desenvolvimento da proposta para a nova plataforma
In2Museum para o Museu das Comunicações (MC). Este projecto fundamenta-se na oportunidade que
a Internet, as redes sociais online e os novos media podem facultar a comunicação em rede, a expansão
do espaço físico e a interacção com os públicos.
A In2Museum tem como objectivo proporcionar à instituição uma comunicação mais eficiente e
eficaz, que permita divulgar património cultural material e imaterial, promover a participação activa
do público e aquisição do conhecimento através do saber/entretenimento. A In2Museum visa
desenvolver sinergias entre o Museu das Comunicações e o Arquivo Municipal de Lisboa – Núcleo
Fotográfico (AML), com novos parceiros e público(s).
O elo de ligação e interacção entre eles é a colecção de desenhos a tinta-da-china de chafarizes de
Lisboa, do Museu das Comunicações. Assim, o chafariz é o elemento chave, o qual permite
desenvolver uma plataforma multimédia modular num ambiente comunicacional Web 2.0 com recurso
a QR Code. Pretende-se que a evolução esteja sempre presente, bem como, a partilha de informação
técnico-científica e/ou histórias sociais relevantes de forma a contribuir para a promoção universal do
património cultural local através de uma divulgação global.In the present work, we plan to launch reflections and contributions to the discussion of a new concept of multimedia platform, based on the analysis of several case studies. Thus, we present the study that led to the development of the proposal for the new platform In2Museum to the Communications Museum (MC). This project is based on the opportunity the Internet, online social networks and new media can provide to the network communication, the expansion of space and interaction with the public. The In2Museum aims to provide the institution with the means to communicate more efficiently and effectively, enabling discloser of material and immaterial cultural heritage, promote active public participation and acquisition of knowledge through learning / entertainment. The In2Museum aims to develop synergies between the Communications Museum and the Photo Centre of the Municipal Archive of Lisbon (AML), with new partners and audience(s). The liaison and interaction between them is a collection of china-ink drawings of Lisbon´s fountains, belonging to the Museum of Communications. Thus, the fountain is the key element, which allows developing a multimedia modular platform in a Web 2.0 communication environment using the QR Code. It is intended that the evolution is always present, as well as the sharing of scientific and technical information and / or relevant social stories that can contribute to the universal promotion of local cultural heritage through a global disclosure.